w/ 54s keep in mind that you're actually behind his stealing range along with being OOP so you'll probably need fold equity somewhere in the hand to make it profitable to defend, which is usually preflop or on the flop. You're so far behind on the flop c/c isn't even funny. If you were planning on c/c flop and leading turns or c/r'ing them (if he's barreling it with high frequencies) then this is really a card you should be doing it on. c/c on turn is meh given how small of a bet it was. But like every reason that i've tried to give to justify defending here is villain dependant and none of them probably apply here. you should also be planning future streets when doing things like this which i don't think you were ;(