100NL 100BB stacks effective

Villain raises HJ to 4bb from the Hi-Jack
Hero calls KcQc on Bttn
Blinds fold

Flop As2sTc Pot = 9.5bb
Villain bets 7.5
Hero?

Basically, in situatios like these, where villain is using a larger sizing, do you think it is still profitable to float and try to bluff spade turns when checked too/realize your small % of equity. It feels quite tight to be folding here after flatting preflop, but I cant really justify a float here and see it being profitable