You could study anything, really, since there is no specialty for the position you desire. Like chrisw said, you would primarily need to focus your time on internships, networking, and working your way up to that position, which could take some time. What’s important is that whatever you choose to study provides you with the skills you need for that job, such as time management, strong communication skills, negotiation, etc.
Having some knowledge of the industry (e.g., if you work for a tech company, understanding the basics of what they do) and some business management skills in general could help. Even if you’re not the one making the decisions or doing the technical work, understanding what’s going on around you within the organization can help you to thrive in your support role and may assist in your ability to move up the ladder. Of course, you don’t need a degree for any of that. You could learn on your own, on the job, through internships, and other avenues.