The amount of 750 milliliters equals slightly more than 3.17 cups. Both are units of volume, but cups are part of the American form of measurement, and milliliters are included in the metric system, used by most countries around the world.
Other examples of volume measurements in the United States include teaspoons, tablespoons, pints, quarts and gallons. The relationship between the units varies significantly. For example, there are 3 teaspoons in 1 tablespoon, 16 tablespoons in 1 cup and 4 cups in 1 quart. Metric volume measurements concentrate on milliliters and liters. There are 1000 milliliters in 1 liter. One quart is slightly more than 1 liter.