betsize riverboat NL400

[ogdundar]

My image is LAG, I have won alot of pots without showdown and recently caught with a big bluff in a 3bet pot. Villain is running 21/13 and seems like a decent TAG.

Texas Hold'em NL $2.00/$4.00
Hero is CO ($462.40 in chips)
BTN ($203.40 in chips) DEALER
Villain ($396.00 in chips)
BB ($72.00 in chips)
UTG ($662.20 in chips)
MP ($595.80 in chips)
SB: Post SB $2.00
BB: Post BB $4.00
*** HOLE CARDS ***
Dealt to Hero [6d 6s]
UTG: Fold
MP: Fold
Hero: Raise $14.00
BTN: Call $14.00
Villain: Call $12.00
BB: Fold
*** FLOP *** [Jh 7s 7c]
Villain: Check
Hero: Bet $32.00
BTN: Fold
Villain: Call $32.00
*** TURN *** [2d]
Villain: Check
Hero: Check
*** RIVER *** [6c]
Villain: Bet $74.00

Hero raises to...?