The composite solid consists of two hemispheres stuck together. The diameter of large hemisphere is 12 centimeters and small hemisphere is 6 centimeters. Find the volume of the solid.

Round your answer to two decimal places.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The composite solid consists of two hemispheres stuck together. The diameter of large hemisphere is 12 centimeters and small hemisphere is 6 centimeters. Find the volume of the solid.

Round your answer to two decimal places.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The composite solid consists of two hemispheres stuck together. The diameter of large hemisphere is 12 centimeters and small hemisphere is 6 centimeters. Find the volume of the solid.

Round your answer to two decimal places.