Melbourne is the capital city of the Australian state of Victoria and is known for its cultural diversity, food scene, sports, and arts. As of 2023, the estimated population of Greater Melbourne is around 5 million people, which certainly exceeds the 3.5 million mark you mentioned. It's the second-largest city in Australia and one of the largest cities in Oceania.

Some key points about Melbourne:
- It consistently ranks as one of the world's most livable cities.
- Known for its trams, coffee culture, and sports (especially Australian Rules Football).
- Home to numerous universities and cultural institutions.
- Has a diverse population with significant immigrant communities from all over the world.

If you have any specific questions about Melbourne or need more details on its population, demographics, or attractions, feel free to ask!