bet smaller on flop, and bigger on turn, we have range advantage on this board, we don't have to go nuts with a full pot bet on flop. Turn is too small, we are pricing in naked flush draws almost. Turn check raise tells us we are behind, and villain can credibly rep value combos, they can flat 88 / 55 / 44, A8s / A5s / 76s. 54 is only combo that value owns itself 2 combos only, or a bare ace checkraising, but ace favors our range more than villain's, so if he's a thinking player he's unlikely to checkraise a dominated Ax type hand. It would be probably check, bet a sizeable amount, get sizeably checkraised, and then decide, or check, bet large, get called, and decide whether or not to value bet the river on good runouts.
Seeing that he has 76o means that he is playing too many hands, but we have no sample.