Seems like a pretty clear squeeze pre with a loose CO open and solid villain only calling from the SB.
As played it looks like he's capped at 77/66/AT/A7/A6/76 so I'd feel comfortable turning your hand into a bluff with the A
blocker and 4 to the straight on the board and bet something like $550.
ps: it's easier for people to follow along if you put the size of the pot on each street