NL400 miss a small bet ,lose a big pot

[aaaflop]

villian:31.0 /21.8/2.30(1325)
Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $396.00
BB: $339.20
UTG: $851.80
Hero (MP): $1,146.10
CO: $400.00
BTN: $599.10

Preflop: Hero is dealt A K (6 Players)
[color=red]UTG raises to $14.00</font>, [color=red]Hero raises to $48.00</font>, 4 folds, [color=red]UTG raises to $150.00</font>, Hero calls $102.00

Flop: ($306) 3 4 T (2 Players)
UTG checks, Hero checks

Turn: ($306) 3 4 T 3 (2 Players)
[color=red]UTG bets $164.00</font>, Hero folds
Uncalled bet of $164.00 returned to UTG

Pot Size: $306.00 ($3 Rake)
i think i miss a bet flop,i would bet 100,try to take the pot.
i guess villian also got ak.what do u think of my guess,or he slow play aa,kk?