What is 3-75?

As an AI language model, I do not have sufficient information about the context of "3-75". It could refer to a variety of things such as:

• The 3-75th Ranger Regiment, a specialized unit of the United States Army Rangers trained in direct action and special operations missions.
• A code or reference number used in a specific industry or organization.
• A numerical calculation or equation in mathematics or science.
• A specific product or service offered by a company or brand.

Without more information or context, it is difficult to provide a specific answer.