It could just be curiosity, he could be hungry even though he does not need to eat. Some snakes will eat themselves to death if you let them (just like any other living animal), some are just more interested in their surroundings. Granted certain species have a generally excepted demeanor, they are still individuals. Just be glad you get to see yours. Ours are exactly the opposite. If their heads are out of their hide and they see movement, they usually retreat back in and out of sight. Our womas on the other hand are exactly the opposite. I have never seen a species so inquisitive.
Also, keep in mind in the wild they are opportunistic hunters. If they waited 7 days to eat, they may miss an opportunity and have to wait even longer.