James Bond is planning an escape route from the top floor of the Empire State Building, which has a height of 1,250 feet. His plan is to have a zip-line to another nearby building with a height of 615 feet. The angle of depression from the top floor of the Empire State Building to the top of the nearby building is 68º. To the nearest foot, how long does the zip-line need to be in order to attach it from the Empire State Building to the nearby building? The zip-line needs to be feet.