The last time I checked (2002), it was 9500 lbs with two people and 30-40 gal of fuel. The hook was part, but the balance was also important. Good balance to me is the boat is stable in flat water with no porpoise at WOT with the drives fully trimmed and the tabs neutral.
The biggest deal/improver was the high X with Bravos....60-80%...oh, and the Imco lowers was big at 4 MPH past 90 MPH.
Hook is when the hull turns down at the transom. You can check yours by putting a long straight edge on the bottom (transom forward). Removing the hook may get you some speed, but you might not like the way the boat rides at cruise.