In the case of a cheekbone fracture, you may notice a change in the appearance of the cheek. In many cases the side of the face may look pushed in or the lower part of the eye socket (lower orbital rim) may appear depressed.
A cubic yard is a volume, 1 yard by 1 yard by 1 yard.
Since 1 cubic yard = (1 yard)3 and 1 yard = 3 feet, that means 1 cubic yard = (3 feet)3 = 33 feet3 = 27 cubic feet. So divide this into the amount of dirt: 10 890 000 cubic feet / (27 cubic feet per cubic yard) = 40 333 cubic yards. That's how much dirt you would be excavating and moving. You will have to determine how much effort goes into the job in order to determine an appropriate price.