Auto loans approvals use auto enhanced FICO scores which you cannot buy. Unfortunately,there is no way to determine how close or if you are even over the 740. In case you are worried, getting your util down and having it update before you app would be the other way to go.
Scores used by dealerships for credit purposes. Just as credit card companies may use bank enhanced scores. They are specific to the type of loan and are not available for purchase by consumers.