I'm not saying that it is not believable, just that I don't think it will work. If you're repping a range that is either overpairs/sets or a bluff, people LOVE to put you on a bluff, and I really don't think you can get him to fold middle pairs on the turn by raising very often... that's why it's a fine value line. You'll have to barrel the river or hope you draw out imo... so I think if you're going to bluff raise the turn you have to bet the river as you did, but I'd rather just give up on the turn.

I just don't think he's donking the flop 3-way and follows up on the turn with air. If he checks the turn you might get him off 55-TT, but when he bets again I think this is QQ a lot.
There's not even anything he could be semi-bluffing with... I really don't know what you're hoping to make him fold.