$11 - Flopped boat, bad river

[McDirk]

First few hands of tourney so no reads. Looking back
I think I should have check-raised the flop and/or raised more on the turn. Thoughts?

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button (t1580)
Hero (t1500)
BB (t3160)
UTG (t1490)
UTG+1 (t1590)
MP1 (t1560)
MP2 (t1470)
CO (t1150)

Preflop: Hero is SB with 6, 6.
UTG calls t20, UTG+1 calls t20, [color=#666666]4 folds</font>, Hero completes, BB checks.

Flop: (t80) 6, 7, 7 [color=#0000FF](4 players)</font>
Hero checks, BB checks, UTG checks, [color=#CC3333]UTG+1 bets t100</font>, Hero calls t100, BB folds, UTG folds.

Turn: (t280) 3 [color=#0000FF](2 players)</font>
Hero checks, [color=#CC3333]UTG+1 bets t120</font>, [color=#CC3333]Hero raises to t300</font>, UTG+1 calls t180.

River: (t880) 3 [color=#0000FF](2 players)</font>
Hero checks, UTG+1 checks.

Final Pot: t880