turned nut f/d against station

[Riverrun]

villian is 31/18/2 (with a turn aggression factor of 4). his folds to c-bet, folds s/b to steal, and folds bb to steal are all under 50%. he's been floating me a ton and if he's had position, i've been shutting down if i missed after the flop. What kind of range do you put him on here and what's your turn play?

Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $576.00
BB: $633.00
UTG: $230.90
Hero (MP): $729.30
CO: $441.30
BTN: $435.00

Preflop: Hero is dealt 6[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] (6 Players)
UTG folds, <font color="red">Hero raises to $14.00</font>, CO calls $14.00, 3 folds

Flop: ($34) 4[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $22.00</font>, CO calls $22.00

Turn: ($78) 3[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $37.00</font>, <font color="red">CO raises to $100.00</font>

Hero?

[Hoopster81]

call, spike, stack, etc.

also, make a real bet on the turn (and the flop)