Let's give him some generic ranges, since we don't have any reads on him:

Pre-flop call of raise in position: AA-77, AK-A7, KQ-KT, QJ
Raise on flop: AA-99, 55, AK-A7
Bet on turn: AA, 99, 55, AK-AJ, A9

Question is whether you have equity against that range.