This is what I would do. Wait four or five days. Do not handle the snake in that time. Feed at or after dusk. In a quiet room. In a tiny container- margerine cup sized or the deli cup the snake came in. Thaw the pink for a minute or two in hot water. Right before placing it in the feeding container, hold it under the HOTTEST water for a few seconds. Cut four slits in the pink's back with a tiny scissors. Put the pink in the container. Get the snake. While holding the snake gently, just offer the pink with your fingers a couple times. If he takes it, freeze! If he isn't interested, or is frightened, just put him in his deli cup with the pink, cover with a dish towel or T shirt, and do not disturb for an hour. NO PEEKING! If, after an hour he hasn't fed, reheat the pink to very hot, put it back in the deli with the snake, put the whole thing back in the snake's viv with the lid on the deli and the cover on the viv. Maybe toss a paper towel over the deli so the snake can't see out. Check him in the morning. If he hasn't fed, repeat in five days. If he still hasn't fed, ask for more help, here.
The key points are:
Stress-free snake from not being handled or otherwise disturbed.
Hungry snake from waiting four or five days between feeding attempts.
Very hot pink.
Small feeding container so the snake can't wander off and forget about the pink.
Feeding at night at the natural time a snake eats.
Covering the deli cup so the snake isn't trying to escape and isn't watching you.
Giving him plenty of undisturbed time to decide it is safe to feed.