Jhonny uses a wheelbarrow to move planting soil to a delivery truck. The volume of the planting soil that fits in the wheelbarrow measures 2 feet by 3 feet by 1.5 feet. The delivery truck measures 11 feet by 8 feet and is 6 feet tall. Jhonny puts planting soil in the delivery truck until the truck is 70% full. What is the minimum number of times Jhonny needs to use the wheelbarrow until the delivery truck is 70& full?