You'll need to provide more information to calculate the volume of air in a balloon! Here's what we need to know:

1. The Shape of the Balloon:

* Spherical: A perfectly round balloon is the easiest to work with.

* Other Shapes: Balloons come in many shapes (oval, pear-shaped, etc.). We'll need to know the specific shape or have dimensions to calculate the volume accurately.

2. Dimensions of the Balloon:

* Radius (for a spherical balloon): The distance from the center of the balloon to the surface.

* Length and width (for other shapes): We'll need specific measurements for the balloon's dimensions.

Here's how to calculate the volume once you have the information:

For a Spherical Balloon:

* Volume = (4/3) * π * r³ where 'r' is the radius.

For Other Shapes:

* We'll need to use specific formulas for those shapes or use methods like water displacement to determine the volume.

Let me know the shape and dimensions of your balloon, and I can help you calculate the volume!